It sounds like you're just describing a religion/cult. All talk, all faith in each other, no substance to back it up, no one dare doubting what is established as true. It's almost like that's where the name came from.
A group of people integrated by a lie can achieve things orders of magnitude greater than the same number of mavericks living their lives fully grounded on evident truths. This is the evolutionary explanation of religion/cults in a nutshell.